Heater for automobiles



Feb. 4, 1930. E. M. RAETZ v 1,745,711

HEATER FOR AUTOMOBILES Filed Feb. 23, 1929 2 Sheets-Sheet l {kil 2 MM. A. l

A Inventor E Ede/Z A iiorney Feb. 4, 1930. RAETZ 1,745,711

HEATER FOR AUTOMOBILES Filed Feb. 23, 1929 2 Sheets-Sheet 2 l H N Inventor Z (a. Ede/Z A iiorney Patented Feb. 4, 193-0 UNITED STATES PATENT OFFICE EDWIN M. RAETZ, OF ROCHESTER, MINNESOTA HEATER FOR AUTOMOBILES Application filed February 23, 1929.

The present invention pertains to new and useful improvements in electrical heating and more particularly to a novel liquid heater especially adapted for use on automobiles. The

principal object of the invention is to provide a system including heating means for heating both the crank case and the liquid cooling system of an automobile.

An important object of the invention is to provide a heater for crank cases which can be quickly and efficiently mounted in position.

Another object of importance is to provide a heater especially adapted for use in conjunction with the liquid cooling line of the automobile whereby the liquid may be heated to facilitate starting of the motor in cold weather.

Another object of the invention is to provide a heater adapted to be applied to the outside of the usual crank case for raising the viscosity of the lubricant during cold weather.

These and other objects of the invention will become more readily apparent to the reader after considering the invention as described and claimed hereinafter.

In the drawing:

Figure 1 represents a fragmentary side eleration showing the improved device applied to one side of the crank case.

Figure 2 is a fragmentary vertical transverse sectional view of a crank case with the improved heater applied thereto.

35 Figure 3 is a fragmentary detail View.

Figure 4 is a fragmentary partial sectional view disclosing the details of a modification of. another heater employed in the heating system.

Figure 5 is an end elevation of the heater structure shown in Figure 4.

Fi ure 6 is a diagrammatic view showing the two heaters in the improved heating system.

Referring to the drawings wherein like numerals indicate like parts, the usual crank case A of an automobile is shown in Figure 1 with the improved heater applied to one side thereof, and generally referred to by the numeral 3. The upper edge of the crank case Serial No. 342,012.

is provided with the usual flange B whereby the same is secured to the engine block.

A heating element 4, shown in Figure 6, is enclosed within a jacket 5, of preferably rectangular configuration. The jacket 5 has a I rectangular frame 6 secured thereto in substantially the manner shown in Figure 1 and within the frame 6 a channel bar 7 is adapted to be seated.

- The bar 7 has its outturned flanges slotted as at 8 to receive a pair of L'-shaped strap members 99. The straps 99 are arranged invertly and secured to the usual flange B by the same bolts C employed for securing the crank case to the engine block. The lower ends of the straps are secured together by a rivet or the like 10.

An angle bar 11 has one flange thereof slotted to receive the straps 9-9, while the other flange thereof is adapted to bear against the outer edges of the straps 99. The bolt 12 is threadedly engaged through the angle bar 11, and channel bar 7 at each side of the strap 9-9. A jam nut 18 is threadedly engaged on the bolt 12 and prevents the unscrewing of the bolt after once having been properly adjusted.

As is clearly shown in Figure 2, by tightening the usual nut D on the bolt C, and

against the upper leg portions of the inverted U straps 99, the lower portion of the strap will be caused to bear tensionally against the jacket 5 and due to the clamping action of the channel bar 7 and angle bar 11, the j acket containing the heating element will be prevented from slipping from the straps 99.

Referring to Figure l a somewhat different style of heater is shown, but included in the present improved systems. This heater is especially adapted for interposition within the liquid cooling system of the automobile, and includes in construction an inverted T- shaped fitting 14, the upstanding portion of which is internally threaded to receive the threaded plug portion 15 of a cap 16, which cap is of sufficient dimension to project beyond the periphery of the upstanding portion of the fitting. A pair of terminal posts 17-17 are mounted upon the cap 16, and

protect conductors disposed therethrough from the cable 18 to the heating element 19, shown in Figure 6, and located within the protecting tube 20 projecting from the threaded plug 15 into the elongated portion of the fitting 14:. The elongated portion of the fitting is adapted to have its end portions disposed within the adjacent ends of a bisected line 21.

Obviously in the construction of the present invention, numerous changes may be resorted to in the specific shape, size and materials without departing from the spirit and scope of the invention as claimed hereinafter.

Diagrammatically in Fig. 6, a switch 23 is interposed across the circuit between the features 4 and 19 which permits the energization of the heater t separately and independently of the heater 19 and quickens heating time when the two heaters are used in series and using only one-half of the amount of time which the heaters are normally rated at. Having thus described the invention, what I claim as new and desire to secure by Letters Patent is A crank case heater comprising an electrical heating element, a jacket for said element, a rectangular frame secured upon said jacket, a channeled bar seated within said frame and having a slot in each flange thereof, an angle bar having one flange thereof disposed in overlapping relation to one flange of the channeled bar, said angle bar having 7 a flange thereof formed with a slot for registry with the slot in the channel bar flanges,

a strap disposed through said slot and secured at one end to the engine block, and means for clamping said channeled bar and angle bar against the strap to secure said element containing jackets against the crank case.

In testimony whereof I aflix my signature.

EDWIN M. RAETZ. 

